Parent taxon: Polychaeta according to J. J., Jr. Sepkoski 2002
Sister taxa: Aciculata, Aeolosomatidae, Amphinomorpha, Arachnostega, Bundenbachochaeta, Caprascolex, Drilomorpha, Ebetallites, Eopolychaetus, Eotrophonia, Eunicida, Flabelligerimorpha, Geophilus proavus, Haileyia, Hammatopsis, Hesionites, Hirudopsis, Khemisina, Klakesia, Leodicidae, Lockportia, Microtubus, Miskoa, Nawnites, Oliveirania, Onuphionella, Palaeotubus, Palpata, Parergodrilidae, Phragmochaetidae, Phyllodocemorpha, Pontobdellopsis, Potamodrilidae, Propolynoe, Psammodrilidae, Pyllodocida, Ramesses, Ruedemannella, Sarcionata, Schizoproboscina, Scolecida, Sedentaria, Sedentarida, Serpulimorpha, Siboglinidae, Soris, Spiomorpha, Spiroglyphus, Stoma, Terebellomorpha, Tosalorbis, Tubicola, Tubulelloides, Tymbochoos
Subtaxa: Aglaurides Albertaprion Anisocerasites Arabella Arabellites Archaeoprion Brochosogenys Delosites Diopatraites Dorvillea Drilonereis Elleriprion Eunice Euryprion Falkosites Gotlandites Hadoprion Halla Hindenites Hindeoprion Lanceolatites Langeites Lumbriconereis Lumbriconereites Lysaretides Marlenites Marphysaites Microdactylophora Multiprion Nereidavus Nothrites Notocirrus Oblongiprion Onuphis Ophryotrocha Orthopelta Ottawella Oxyprion Palaeodactylophora Palaeopelyx Paleononites Palurites Paragnathites Pernerites Pistoprion Polychaetaspis Praelumbrinereis Processoprion Protarabellites Rhamphegenys Rhytiprion Schistomeringos Sciotoprion Serratula Skalenoprion Staurocephalites Symmetroprion Tetraprion Trentonia Trianguligenys Uncinogenys Xanioprion
Ecology: epifaunal carnivore
Distribution:
• Jurassic of France (1 collection), Germany (1)
• Triassic of Italy (1)
• Carboniferous of the United Kingdom (1), United States (2: Indiana)
• Devonian of Germany (1), United States (1: Iowa)
• Silurian of Canada (1: Northwest Territories), the Czech Republic (19), the Russian Federation (3), Sweden (14), the United Kingdom (6)
• Ordovician of Canada (2: Ontario, Quebec), Estonia (4), Sweden (1), United States (13: Kentucky, Ohio)
Total: 71 collections including 123 occurrences